ok here is what mods to use the 3 racing F113 front wing
Step one, the back hole mount where the red arrow is pointing that needs a few mm taken off the top,
The mount hole where the green arrow is pointing is too wide and needs the sides shaved 1 mm, sorry my camera didn't really pick up the black wing where I had done this already.
Step 2 you will need to countersink the following hole, you can just use the main mounting hole but you will find with the first hit to the wing it will move.
Beth.